It produces rock physics consistent impedances and higher resolution results, while providing a method of investigating uncertainty. RokDoc Ji-Fi allows more realistic, more accurate estimation of facies and impedances in the subsurface. The method has multiple advantages over both conventional and other facies-based seismic inversion techniques it is facies-aware and rock physics consistent, and therefore frames the inverse problem correctly it is a truly 3D inversion and it allows both geological and data uncertainties to be captured and investigated. RokDoc Ji-Fi (Joint Impedance and Facies Inversion) is a unique Ikon Science technology for estimating facies and impedances directly from seismic data. Pre-drill prediction of gas column thickness within 4ft of that encountered by the post-inversion well. Elastic impedances that are consistent with regional rock physics trends and the investigation of geological uncertainty. Results: Accurate pre-drill prediction of facies layering and geometry, hydrocarbon contacts and hydrocarbon column. A truly 3D inversion where the mixed discrete/continuous nature of the inverse problem is captured allowing for the prediction of precise facies transitions.
A method of capturing the geological uncertainty in the inversion scheme, and the ability to investigate and understand that uncertainty. Solution: A reservoir characterization tool that predicts facies directly from seismic data based on, and consistent with, a robust understanding of regional rock physics trends per facies. CASE STUDY Predicting facies geometry and pay thickness in a frontier basinĬhallenge: In this frontier basin, sparse well control coupled with complex seismic responses from a mixed clastic-carbonate settings means that predicting reservoir, and pay, presence is highly uncertain and subsequently well placement is high risk.
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